<?php 

namespace nb;


function demo()
{
    echo 'demo.. <br>';
}

// demo();
$func = '\nb\demo';
$func();


class User
{
    public static function test()
    {
        echo 'test.. <br>';
    }
}

// User::test();
$class = '\nb\User';
$class::test();



const DDS = '大屌丝';
$c = '\nb\DDS';
// echo $c;
echo constant($c);


